Piston



H. J. HATER Sept. 8, 1931. Re. 18,178

PTS'MN.

Original Filed Sept. 15, 1922 l /"gal.

Ifiuenfor: Harry :[Hzlen Ream-d Sept; 8, 1931.,

UNITED STATES PATENT orries may .1. HATER, or cnwcnmn'rx, omdnsslenoa,BY mnsmi lssmmrms, 'ro rm:

cmwmxn 'rnus'r comrnmr, or cmvmma, 01110 Heron Original No. 1,666,488,datedlanuary I7, 1928, Serial No. 588,478, filed September 15, 1922.Application for reissue fled April 28, 1928. Serial No. 274,821.

My invention relates to pistons of the type generally used in internalcombustion englnes, the piston comprising generally a solid head portionand a skirt or tubular portion extending from the'head portion.

The object of my invention is to construct a iston which will not beexpensive to manu acture; which will fit efliciently in the cylinderwithout scoring or otherwise injuring it-; which will fit in thecylinder with less clearance than is'necessary in other pistons; whichwill not knock, slap, or chatter; which will have a llIllfOllHfitinthecylinder throughout its circumference; which will function properlyatallspeeds of the motor; which will not cave in; which willnot springon the thrust side of the motor when subjected to load, and which Figure2 is a section on line 22 of Figparts.

ure 1;

Figure 3 is an elevation with the piston turned 90 degrees from thepiston shown in Fi re 1;-

igure 4 is asection on line H of Figure 3; and

Figure 5 isa section online 5-5 of Fig- My piston designated as a wholeby 1 has a solid head 2 and a'depending hollow skirt 3. The headcontains the usual piston ring gzooves 4, three being shown. The headlow the lower groove is slightly beveled, shown accentuated in thedrawings at 5, to enable the oil which reaches this part of the head todrain back through the relief oil holes and the transverse slits in theskirt of the piston. The metal of the skirt portion is cut away at 6 inthe form of a key stone around the piston pinopening 7'. Oil holes ,8are spaced around each piston pin opening within the key stone relief. Atransverse slit 9 extends from just inside onekey stone relief to justinside the opposite key stone relief. A diagonal slit 10 extends fromthe transverse slit to a lower' transverse slit 11 of the cylinder.

which is'parallel with the uppertransverse slit and of practically thesame length. The

transverse slits and diagonal slit are dup licates-on opposite sidesof'the piston. A vertical slit 12 extends from the bottom of the skirtsubstantially in line with the center of the piston in openin stonereliet. .These diagonal slits are inopposite sides of the piston and areduplicates. The piston has theusual piston pin bosses 13. A rib 14adjacent the lower part of the skirt extends around the insidecircumferto just within the key ence'of the skirt disappearingat thepart directly below the piston pin bosses. There may be openings 15 fromthe inside of thepiston to the bottom of the lower ring groove.

The construction described results inthe production of a pairof;resilient parts on opposite sides of the piston 90 degrees from thepiston pin openings. As these parts do not extend to the bottom of theskirt of the piston, they will not be s rung out of alignment, thisbeing preven by the uncut skirt portion below the bottom of theresilient The-vertical slits take care of the expansion of the piston,preventing scoring Having thus described my invention, what .I claim anddesire to protect by Letters Patent is Y 1. A piston comprising a headand'depend ing skirt, said skirt having piston pin openings therein,said skirt having reliefs around said openings, said skirt having.transverse slits therein, one of said transverse slits extending from apoint within one relief to a.

point within the opposite relief, said skirt having a diagonal slittherein connecting said transverse slits and said skirt lraving avertical slit therein extending from the bottom of said skirt to a pointwithin said relief.

.2. A piston comprising ahead'and depending skirt, said skirt havlngpiston in openings therein, said skirt having relie 3 around saidopenings, said skirt having transverse slits therein on opposite sidesof said skirt,

one of each of said'transverse slits extending from a point within onerelief to a point within the opposite relief, said skirt having diagonalslits therein on opposite sides of said 2. isms skirt connecting eachpair of slits, and said skirt having vertical slits on ofiiposite sidesof 881d skirt from t e bottom of said skirt to a point within saidreliefs. V

3. A- piston comprisingahesd and depending skirt, said skirt ha pistonin open ings therein, said skirt having relie around said openings, saidskirt hav' transverse slits therein on o posite sides 0 saidskirt, oneof each of sai transverse slits extending from 1; int within one reliefto apoint within 0 opposite relief, said skirt havin dia nal slitstherein on opposite sides 0 u sai skirt connecting each palroftransverse slits, and said skirt havln vertical slits therein onopposite-"sides 0 'said skirt ex- 1 a 1 tending from the bottom of saidskirt to a int viiithig relielfls, said verticgl slits. in pace su antia90 egrees roma verl csaakll line extendtihng the'botttim o5 sai'rtthrtmgh emi epointo sai din alslits.

testimony whereof I afix mas ature. I HABBYJ; R.-

